EP4137268A1 - Dispositif d'injection de fluide de refroidissement - Google Patents

Dispositif d'injection de fluide de refroidissement Download PDF

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Publication number
EP4137268A1
EP4137268A1 EP21805010.2A EP21805010A EP4137268A1 EP 4137268 A1 EP4137268 A1 EP 4137268A1 EP 21805010 A EP21805010 A EP 21805010A EP 4137268 A1 EP4137268 A1 EP 4137268A1
Authority
EP
European Patent Office
Prior art keywords
cooling medium
passage
main shaft
nozzle
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21805010.2A
Other languages
German (de)
English (en)
Other versions
EP4137268A4 (fr
Inventor
Hitoshi Ishikawa
Hiroyuki Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NT Tool Corp
Original Assignee
NT Tool Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NT Tool Corp filed Critical NT Tool Corp
Publication of EP4137268A1 publication Critical patent/EP4137268A1/fr
Publication of EP4137268A4 publication Critical patent/EP4137268A4/fr
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10Arrangements for cooling or lubricating tools or work
    • B23Q11/1015Arrangements for cooling or lubricating tools or work by supplying a cutting liquid through the spindle
    • B23Q11/1023Tool holders, or tools in general specially adapted for receiving the cutting liquid from the spindle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10Arrangements for cooling or lubricating tools or work
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/085Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to flow or pressure of liquid or other fluent material to be discharged
    • B05B12/087Flow or presssure regulators, i.e. non-electric unitary devices comprising a sensing element, e.g. a piston or a membrane, and a controlling element, e.g. a valve
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B05B9/0416Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material with pumps comprising rotating pumping parts, e.g. gear pump, centrifugal pump, screw-type pump
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B05B9/0426Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material with a pump attached to the spray gun or discharge device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0042Devices for removing chips
    • B23Q11/0075Devices for removing chips for removing chips or coolant from the workpiece after machining
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q2220/00Machine tool components
    • B23Q2220/008Rotatable tool holders coupled in parallel to a non rotating accessory
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q2230/00Special operations in a machine tool
    • B23Q2230/002Using the spindle for performing a non machining or non measuring operation, e.g. cleaning, actuating a mechanism
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the present invention relates to a cooling medium spray device that sprays a cooling medium that is being supplied from a main shaft of a machine tool.
  • a tool holder that is mountable on a main shaft (which is called as a "spindle") of the machine tool is used. Furthermore, when machining a workpiece using a tool, it is necessary to supply a cooling medium such as an oil to a cutting edge of the tool for the purpose of lubrication between the workpiece and the tool, cooling of the workpiece or the tool, removal (cleaning) of chips (sometimes called “swarf") generated by the machining operation, or the like. Therefore, a tool holder, which is provided with a cooling medium supply mechanism that sprays the cooling medium that is being supplied from the main shaft of the machine tool to a cutting edge of the tool, is used.
  • a cooling medium supply mechanism that sprays the cooling medium that is being supplied from the main shaft of the machine tool to a cutting edge of the tool.
  • Patent Document 1 Japanese Unexamined Patent Application Publication No. S62-4550
  • a tool holder which is provided with a cooling medium supply mechanism constituted by a pump that has a rotating part coupled to the main shaft, is used.
  • Patent Document 1 Japanese Unexamined Patent Application Publication No. S62-4550
  • Chips generated during machining of a workpiece cannot be sufficiently removed using a cooling medium sprayed from a cooling medium supply mechanism provided in a tool holder at the pressure of the cooling medium that is being supplied from a main shaft of a typical machine tool.
  • burrs generated during machining of the workpiece cannot be sufficiently removed.
  • the tool holder disclosed in Patent Document 1 is one that sprays the cooling medium to a cutting edge, etc. of a tool while machining a workpiece using the held tool. Therefore, there is a limit to increasing the rotational speed of the tool holder.
  • the present invention was created with these points in mind and it is an object of the present invention to provide a cooling medium spray device that can increase the pressure of a cooling medium that is being supplied from a main shaft of a machine tool while spraying the cooling medium toward a prescribed location in a focused manner.
  • the present invention includes a body part, a support part, a pump, a cap and a nozzle.
  • the body part is configured to be couplable to a main shaft of a machine tool.
  • the body part has a body part passage through which a cooling medium that is being supplied from the main shaft is passed in the state in which the body part is coupled to the main shaft of the machine tool.
  • Various methods can be used as the method that couples the body part to the main shaft. For example, a method that attaches a pull stud to a rear end side of the body part and pulls the pull stud toward the main shaft can be used.
  • the support part is formed in a tubular shape, and the body part is rotatably supported within a support part interior space.
  • the support part is fixed to the machine tool in the state in which the body part has been coupled to the main shaft.
  • the support part is configured such that the body part is non-rotatable relative to the support part in the state in which the body part is not coupled to the main shaft (in the state in which the support part is not fixed to the machine tool), and the body part is rotatable relative to the support part in the state in which the body part is coupled to the main shaft (in the state in which the support part is fixed to the machine tool).
  • Various methods can be used as the method that fixes the support part to the body part.
  • the support part has a first passage and a second passage through which the cooling medium passes.
  • the pump has a rotating part, an inlet port and an outlet port.
  • the rotating part of the pump is rotatably supported within the support part interior space of the support part while being connected to the body part. By rotating the rotating part, the pump increases the pressure of the cooling medium suctioned from the inlet port and discharges it from the outlet port.
  • a variety of configurations of pumps can be used as the pump.
  • the rotating part of the pump may be rotated in conjunction with rotation of the body part, and it may be directly connected to the body part or connected via another member or other members.
  • the cap can be mounted at a location of the support part that is on an opposite side of the body part from the pump so as to close the support part interior space of the support part.
  • the cap has a nozzle hole in which the nozzle is mounted, and a cap passage that communicates with the nozzle hole.
  • the nozzle is formed with a nozzle passage having a spray port, and the nozzle is mounted in the nozzle hole of the cap such that the nozzle passage communicates with the nozzle hole.
  • the body part passage of the body part is configured to communicate with the inlet port of the pump via the first passage of the support part, and the outlet port of the pump is configured to communicate with the cap passage of the cap via the second passage of the support part.
  • the rotational speed of the main shaft is set such that cooling medium having a prescribed pressure is sprayed from the spray port of the nozzle.
  • the cooling medium can be sprayed in a prescribed direction in a focused manner while the pressure of the cooling medium that is being supplied from the main shaft of the machine tool can be increased to a pressure capable of removing chips and burrs generated during machining of a workpiece.
  • chips and burrs left on the workpiece after machining can be reliably removed at a low cost with a simple configuration.
  • a pressure control part which prevents the pressure of the cooling medium that is being discharged from the outlet port of the pump from exceeding a set value.
  • Pressure control parts having various known configurations can be used as the pressure control part.
  • a filter that removes foreign matter contained in the cooling medium is provided in the body part passage.
  • a variety of known filters can be used as the filter.
  • the cooling medium spray device of the present invention By using a cooling medium spray device of the present invention, the cooling medium can be sprayed toward a prescribed location in a focused manner while the pressure of the cooling medium that is being supplied from the main shaft of the machine tool can be increased. Thus, chips and burrs left on a workpiece after machining can be easily and reliably removed.
  • a direction along a center line P of a cooling medium spray device 100 is called the "axial direction”. Furthermore, in the axial direction, the side on which a nozzle 240 is disposed (right side in FIG. 1 ) is called the “front end side”. In addition, in the axial direction, the side (the side on which a body member 110 is disposed) opposite to the side on which the nozzle 240 is disposed (left side in FIG. 1 ) is called the "rear end side”.
  • cooling medium spray device 100 of the invention is described with reference to FIGS. 1 to 3
  • the cooling medium spray device 100 of this embodiment includes a body part, a support part, a cap 230, a nozzle 240, a pump 300, a relief valve 400 and a filter 500.
  • the body part is constituted by a body member 110 and an adapter 120.
  • the body member 110 has a shank part 112 that is coupled to a main shaft of a machine tool at the rear end side.
  • a body member outer peripheral surface part 112a corresponding to the shank part 112 is formed with a tapered surface that is inclined such that the outer diameter decreases from the front end side toward the rear end side.
  • the tapered surface of the body member outer peripheral surface part 112a is formed to be capable of taper fitting with a tapered surface of a main shaft inner peripheral surface part 11a of a main shaft 10 of a machine tool.
  • the body member 110 has an engagement part 113 that is engageable with a rotation stopping lever 215 provided on a cover 210.
  • the body member 110 further has a body member passage 111 extending through the center in the axial direction.
  • the body member passage 111 is formed such that cooling medium that is being supplied from the main shaft 10 passes therethrough in the state in which the shank part 112 of the body member 110 has been coupled to the main shaft 10.
  • the filter 500 is arranged within the body member passage 111 and removes foreign matter contained in the cooling medium passing through the body member passage 111.
  • a variety of known filters capable of removing foreign matter contained in the cooling medium can be used as the filter 500.
  • the adapter 120 is mounted on the front end side of the body member 110.
  • a portion on the rear end side of the adapter 120 is inserted from the front end side of the body member 110 into the body member passage 111 of the body member 110 and screw fastened together.
  • a portion on the front end side of the adapter 120 protrudes from a front end surface of the body member 110.
  • a sealing member such as an O-ring is disposed between the body member 110 and the adapter 120.
  • the adapter 120 has an adapter passage 121 through which the cooling medium passes.
  • the adapter passage 121 has a first passage portion extending in the axial direction and a second passage portion connected to a front end of the first passage portion and extending in a radial direction.
  • a rear end side of the first passage portion communicates with the body member passage 111, and the second passage portion is open to an outer peripheral surface of the portion on the front end side of the adapter 120.
  • the "body part” of the present invention is constituted by the body member 110 and the adapter 120; the “body part passage” of the present invention is constituted by the body member passage 111 and the adapter passage 121.
  • the support part rotatably supports the body part (the body member 110 and the adapter 120) and a rotating part of the pump 300.
  • the support part is constituted by the cover 210, a case 220 and a ring member 225.
  • the body member 110 is rotatably disposed within a cover interior space of the cover 210 via a bearing 211. Thus, the body member 110 is rotatable relative to the cover 210.
  • the cover 210 has a hole 212.
  • the hole 212 is formed at a location that is spaced apart more radially outward (in a direction away from the center line P) than the cover interior space of the cover 210 in which the body member 110 is disposed, and extends in the axial direction.
  • the rear end side is open.
  • a rotation stopping pin 213 is inserted within the hole 212 so as to be movable in the extension direction of the hole 212. Owing to the elastic force of a spring 214, the rotation stopping pin 213 receives a force that moves it in a direction (rear end side) coming out from the hole 212.
  • the rotation stopping lever 215 is fixed to a rear end side of the rotation stopping pin 213.
  • the axial position of the rotation stopping lever 215 is adjusted by a nut 216 that is screwed onto the rotation stopping pin 213.
  • the cover 210 has a groove 217 that can receive the rotation stopping lever 215.
  • the rotation stopping pin 213 moves in the direction (rear end side) coming out from the hole 212 owing to the elastic force of the spring 214.
  • the rotation stopping lever 215 is engaged with the engagement part 113 of the body member 110 and rotation of the body member 110 relative to the cover 210 is prevented.
  • the rotation stopping pin 213 receives a force that moves it in a direction (front end side) that causes it to be inserted into the hole 212 against the elastic force of the spring 214 (described in further detail below).
  • the rotation stopping lever 215 moves from a position at which it engages the engagement part 113 of the body member 110 to a position at which it is received in the groove 217 of the cover 210.
  • the engagement of the rotation stopping lever 215 with the engagement part 113 of the body member 110 is released, the body member 110 becomes rotatable relative to the cover 210.
  • the case 220 is fixed to the front end side of the cover 210 by a bolt or bolts, or the like.
  • the case 220 has a first case passage 221 and a second case passage 222.
  • the ring member 225 is disposed between a portion of the rear end side of the case 220 and a portion of the front end side of the adapter 120.
  • the ring member 225 has a ring member passage 225a that extends in the radial direction and is open to an inner peripheral surface and to an outer peripheral surface of the ring member 225.
  • the ring member 225 is arranged such that the ring member passage 225a communicates with the adapter passage 121 (the second passage portion) and the first case passage 221.
  • a sealing member 226 (such as an O-ring) is disposed between the ring member 225 and the adapter 120, and a sealing member 227 (such as an O-ring) is disposed between the ring member 225 and the case 220.
  • the ring member 225 is prevented from rotating by being pressed by a fixed member 228 that is screwed into an inner peripheral surface of the case 220.
  • the "support part interior space” of the present invention is constituted by the cover interior space of the cover 210, the case interior space of the case 220 and the ring member interior space of the ring member 225.
  • the pump 300 increases (pressurizes) the pressure of the cooling medium.
  • a variety of known pumps having a fixed part and a rotating part can be used as the pump 300.
  • an internal gear pump having the case 220 (fixed part) and a rotating part that is rotatably supported within the case interior space of the case 220 is used.
  • the fixed part of the pump 300 is constituted by the portion of the case 220 that corresponds to the rotating part of the pump 300.
  • a rear end side of the rotating part of the pump 300 is connected to the body member 110.
  • the rear end side of the rotating part of the pump 300 is connected via a knock pin 310 to the adapter 120, which is connected to the body member 110.
  • a portion of the front end side of the rotating part of the pump 300 is rotatably supported within a recess of the cap 230 (described below).
  • the rotating part of the pump 300 is rotatably supported within the case interior space of the case 220.
  • the rotating part of the pump 300 rotates in conjunction with rotation of the body member 110 that has been coupled to the main shaft 10.
  • the pump 300 has an inlet port 301 and an outlet port 302. Furthermore, when the rotating part of the pump 300 rotates, the pressure of the cooling medium that is being suctioned from the inlet port 301 is increased (pressurized) and discharges from the outlet port 302.
  • the outlet port 302 communicates with the second case passage 222.
  • the "support part” of the present invention is constituted by the cover 210, the case 220 and the ring member 225; the "first passage of the support part” of the present invention is constituted by the ring member passage 225a and the first case passage 221; and the "second passage of the support part” of the present invention is constituted by the second case passage 222.
  • the case 220 has a discharge passage 223 that branches from the second case passage 222.
  • the relief valve 400 is disposed in the discharge passage 223.
  • a steel ball (valve element) 412, a valve support 413 and a relief spring 414 are disposed in a relief valve passage 411 in this order from the second case passage 222 side to an outlet port 411 a side.
  • the relief valve 400 prevents the pressure of the cooling medium within the second case passage 222 from becoming a set value or higher. Specifically, when the pressure of the cooling medium within the second case passage 222 becomes the set value or higher, the steel ball 412 and the valve support 413 move against the elastic force of the relief spring 414 toward the side opposite of the second case passage 222. As a result, cooling medium within the second case passage 222 is discharged from the outlet port 411 a, and the pressure of the cooling medium within the second case passage 222 decreases. When the pressure of the cooling medium within the second case passage 222 decreases, the steel ball 412 and the valve support 413 move toward the second case passage 222 side owing to the elastic force of the relief spring 414.
  • the cap 230 is fixed to the front end side of the case 220 by a bolt or bolts or the like so as to close up the case interior space of the case 220.
  • the cap 230 has a nozzle mounting hole 231 in which the nozzle 240 is mounted, and a cap passage 232 that communicates with the nozzle mounting hole 231.
  • the cap 230 is fixed to the case 220 such that the cap passage 232 communicates with the second case passage 222 of the case 220.
  • the nozzle 240 has a nozzle passage 241 that communicates with a spray port 242.
  • the nozzle 240 is mounted in the nozzle mounting hole 231 of the cap 230.
  • the nozzle 240 is mounted in the nozzle mounting hole 231 by a threaded engagement of a male thread formed on an outer peripheral surface of a rear end side of the nozzle 240 with a female thread formed on an inner peripheral surface of the nozzle mounting hole 231.
  • a pull stud 130 is attached to a rear end side of the body member 110.
  • a female thread formed on a body member inner peripheral surface that forms the body member passage 111 is threadedly engaged with a male thread formed on an outer peripheral surface of the pull stud 130.
  • the pull stud 130 has a pull stud passage 131 that extends through the center in the axial direction, in which both ends are open.
  • a portion of the rear end side of the pull stud 130 is inserted into a main shaft interior space 10a that is formed by a main shaft inner peripheral surface 11 of the main shaft 10 of the machine tool.
  • the pull stud 130 is then pulled in the direction of the arrow (to the left in FIG. 2 , toward the rear end side of the main shaft 10) using a pulling-in member 12 provided on the machine tool side.
  • the main shaft inner peripheral surface part 11a of the front end side of the main shaft inner peripheral surface 11 is formed as a tapered surface that is inclined such that the inner diameter decreases from the front end side toward the rear end side.
  • the main shaft inner peripheral surface part 11a is taper-fitted with the body member outer peripheral surface part 112a, and the body member outer peripheral surface part 112a (the shank part 112) is fixedly held by the main shaft inner peripheral surface part 11a. In this manner, the body member 110 is coupled to the main shaft 10.
  • the cover 210 also moves toward the rear end side of the main shaft 10. Then, when the rear end part of the rotation stopping pin 213 of the cover 210 is inserted into a fitting hole 13 formed on the machine tool side, the rotation stopping pin 213 is pressed in the direction (front end side) of being inserted into the hole 212 against the elastic force of the spring 214.
  • the engagement of the rotation stopping lever 215 with the engagement part 113 is released, the body member 110, the adapter 120 connected to the body member 110, and the rotating part of the pump 300 become rotatable relative to the cover 210 and to the case 220 that is fixed to the cover 210.
  • the rotation stopping pin 213 is fixed to the machine tool.
  • the cover 210 and the case 220 are fixed to the machine tool in the state of being restricted from rotating around the center line P.
  • rotation stopping lever 215, which is fixed to the rotation stopping pin 213, in the groove 217 rotation of the rotation stopping lever 215 around the rotation stopping pin 213 is restricted.
  • cooling medium supplied from the main shaft 10 is suctioned from the inlet port 301 of the pump 300 via the pull stud passage 131, the body member passage 111 (including the filter 500), the adapter passage 121, the ring member passage 225a and the first case passage 221. Then, the cooling medium, which has been pressurized by the pump 300, is led into the nozzle passage 241 via the outlet port 302 of the pump 300, the second case passage 222, the cap passage 232 and the nozzle mounting hole 231. Then, it is sprayed from the spray port 242.
  • the cover 210 is fixed to the machine tool
  • the case 220 is fixed to the cover 210
  • the cap 230 is fixed to the case 220
  • the nozzle 240 is attached to the cap 230. That is, the nozzle 240 is fixed to the machine tool via the cap 230, the case 220 and the cover 210 so as to be not rotatable. Therefore, unlike in the prior art, the cooling medium that is sprayed from the spray port 242 of the nozzle 240 is not affected by centrifugal force caused by rotation of the spray port. As a result, the cooling medium can be sprayed toward a prescribed location in a focused manner.
  • the pressure of the cooling medium is prevented by the relief valve 400 from becoming a set value or higher.
  • a "switching mechanism that switches from a cooling medium spray restricted state, in which rotation of the body part relative to the support part is restricted, to a cooling medium spray allowed state, in which rotation of the body part (the rotating part of the pump connected to the body part) relative to the support part is allowed” is constituted by the rotation stopping pin 213 provided on the cover 210 (the support part), the rotation stopping lever 215 provided on the rotation stopping pin 213, the fitting hole 13 provided on the machine tool side, the engagement part 113 provided on the body member 110 (the body part) and the groove 217 provided in the cover 210 (the support part).
  • a machine tool (a so-called "machining center"), which is equipped with a tool magazine that is capable of housing a plurality of tool holders each holding a tool, in which a tool holder, which has been selected in accordance with the machining program from among the tool holders housed in the tool magazine, is mounted on the main shaft, and which machines a workpiece using the tool held in the selected tool holder, will be explained. It is noted that it is configured such that cooling medium is suppliable from the main shaft 10 to the tool holder mounted on the main shaft 10.
  • the cooling medium spray device 100 of this embodiment is housed in the tool magazine together with the plurality of tool holders.
  • a workpiece is attached to the machine tool.
  • a tool holder holding a tool required for the machining is selected from among the tool holders housed in the tool magazine, and is mounted on the main shaft 10. Then, by rotating the main shaft 10, the workpiece is machined using the tool held by the tool holder mounted to the main shaft 10. At this time, cooling medium, which is supplied from the main shaft 10, is supplied to the tool side.
  • the cooling medium spray device 100 housed in the tool magazine is set to a ready-for-use state.
  • the body member 110 is coupled to the main shaft 10, and the cover 210 is fixed to the machine tool (the body side on which the main shaft 10 is rotatably supported).
  • cooling medium that is being supplied from the main shaft 10 is set to a ready-to-be-sprayed state from the spray port 242 of the nozzle 240.
  • the rotational speed of the main shaft 10, on which the body member 110 of the cooling medium spray device 100 is mounted is set such that the pressure of the cooling medium, which is sprayed from the spray port 242 of the nozzle 240 of the cooling medium spray device 100, becomes a pressure capable of removing chips and burrs left on the workpiece.
  • cooling medium spray device 100 or the workpiece
  • cooling medium is sprayed from the spray port 242 of the nozzle 240 toward a location where chips are left unremoved (or chips tend to be left unremoved) on the machined workpiece or toward a location where burrs are generated (or burrs tend to be generated) on the machined workpiece.
  • chips left on the machined workpiece or burrs formed on the workpiece during machining can be reliably removed in a short time with a simple structure without the need for removal by manual labor of an operator.
  • an operation that removes chips and burrs by using the cooling medium spray device 100 is not limited to the above-described operation.
  • the present invention is not limited to the configurations described in the embodiment, and a variety of modifications, additions and omissions are possible.
  • the body part is constituted by the separate body member and the adapter, the body part can be constituted by an appropriate number, which includes one, of member(s).
  • the shape and configuration of the body part can be changed in various ways.
  • the support part is constituted by the cover, the case and the ring member, the support part can be constituted by an appropriate number, which includes one, of member(s).
  • the shape and configuration of the support part can be changed in various ways.
  • the configuration that rotatably supports the body part relative to the support part is not limited to the configuration described in the embodiment.
  • a method that fixes the support part to the machine tool is not limited to the method described in the embodiment.
  • a variety of configurations of known pumps having a fixed part, a rotating part, an inlet port and an outlet port can be used as the pump.
  • the shape and configuration of the cap can be changed in various ways.
  • a variety of configurations of nozzles can be used as the nozzle.
  • the switching mechanism that switches between the cooling medium spray restricted state, in which rotation of the body part relative to the support part is restricted, and the cooling medium spray allowed state, in which rotation of the body part relative to the support part while the support part is fixed to the machine tool is allowed, is not limited to the switching mechanism described in the embodiment.
  • a variety of configurations of the pressure control part other than the relief valve can be used as the pressure control part that controls the pressure of the cooling medium. It is noted that the pressure control part can also be omitted.
  • a variety of known filters can be used as the filter that removes foreign matter contained in the cooling medium. It is noted that the filter can also be omitted.
  • cooling medium spray device of the present invention is preferably used with a machine tool equipped with a tool magazine capable of housing a plurality of tool holders, it can also be used with a variety of configurations of machine tools other than this.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
EP21805010.2A 2020-05-12 2021-04-07 Dispositif d'injection de fluide de refroidissement Pending EP4137268A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020084088A JP6968354B2 (ja) 2020-05-12 2020-05-12 冷却媒体噴射装置
PCT/JP2021/014816 WO2021229962A1 (fr) 2020-05-12 2021-04-07 Dispositif d'injection de fluide de refroidissement

Publications (2)

Publication Number Publication Date
EP4137268A1 true EP4137268A1 (fr) 2023-02-22
EP4137268A4 EP4137268A4 (fr) 2023-09-20

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EP21805010.2A Pending EP4137268A4 (fr) 2020-05-12 2021-04-07 Dispositif d'injection de fluide de refroidissement

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US (1) US20230173631A1 (fr)
EP (1) EP4137268A4 (fr)
JP (1) JP6968354B2 (fr)
CN (1) CN115551674A (fr)
TW (1) TW202216349A (fr)
WO (1) WO2021229962A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023026982A (ja) * 2021-08-16 2023-03-01 エヌティーツール株式会社 冷却媒体噴射装置
JP2023026983A (ja) * 2021-08-16 2023-03-01 エヌティーツール株式会社 冷却媒体噴射装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS624550A (ja) * 1985-06-29 1987-01-10 Dai Showa Seiki Kk 給油装置付き工具ホルダ−ユニツト
JPH0392244A (ja) * 1989-08-31 1991-04-17 Suzuki Motor Corp 工具ホルダ
JP3187472B2 (ja) * 1991-08-27 2001-07-11 日産自動車株式会社 バリ取り装置
JP2003025183A (ja) * 2001-07-12 2003-01-29 Enshu Ltd 工具ホルダの潤滑油吐出量制御方法とその装置
ITMI20052492A1 (it) * 2005-12-27 2007-06-28 Sunbird Investiments Ltd Dispositivo di lubrificazione per macchine utensili
JP6480300B2 (ja) * 2015-10-16 2019-03-06 株式会社スギノマシン ノズル体を装着できる工作機械

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TW202216349A (zh) 2022-05-01
WO2021229962A1 (fr) 2021-11-18
EP4137268A4 (fr) 2023-09-20
US20230173631A1 (en) 2023-06-08
CN115551674A (zh) 2022-12-30
JP6968354B2 (ja) 2021-11-17
JP2021178378A (ja) 2021-11-18

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